Improvement in backwater-traps



L. BRADIJJEISl vBack-Wamel Trap.

Patented Nov. 27, 1877.

Unrrnn PATENT OFFICE.

LUDWIG BBANDEIS, OF BROOKLYN, NEW YOBK, ASSIGrNOItl OF ONE-HALF HIS RIGHT TO GIULIA BRANDEIS, OF SAME PLACE.

IMPROVEMENT IN BACKWATER-TRAPS.

Speeiiication forming part of Letters Patent No. 197,511, dated November 27, 1877 application filed October 30, 1877.

To all whom it may concern:

Be it known that I, LUDWIG BRANDEis, of Brooklyn, Kings county, New York, have in'- vented Improvements in Backwater Traps, of which the following is a specification:

My invention relates to that class of traps intended to prevent the back flow of water from overow of sewers, and consists in constructing the trap so that it may be readily applied inv any line of sewer-pipe, and so that a free discharge of the water, Ste., through the trap may be effected, whether the water is in large or small volumes.

In the drawing, Figure l is a perspective view, partly in section, showing the casing of the trap; Fig. 2, a longitudinal section.

Backwater traps, as usually constructed, can only be inserted in a line of pipes at considerable expense and by skilled workmen, and are inefficient, as the valves will only rise to discharge the water and matters carried thereby where the water is in large volume andv under considerable head or pressure.

To remedy these difficulties I construct the trap with a casing, A, of suitable shape, having an opening, a., in each end to receive the ends of the sewer-pipes b b', and having internal inclined side bearings c c, and a bottom bearing, i, for the valve B, whichis hinged or pivoted directly below the top, and rests on said bearings, effectually sealing the way against any water passing from the pipe b inward.

plate, as usual, consists of two, three, or more sections, n n n", hinged together, as shown.

Thus constructed, the trap may be readily inserted in any line of pipe by workmen of ordinary skill, and the iiow of backwateris ei'ectually prevented. TheA most important advantage, however, results from the construction of the valve.

If the water flows into the trap in large quantities, the entire valve will rise, as shown, in dotted lines and permit its passage. If, however, but Aa small portion of water, insufcient to raise the entire valve, passes int-o the trap, the lower hinged section fn or sections n n of the valve will rise as readily as would the entire valve under the pressure of a greater volume, thus eifectually preventing the retention of any matters in the trap.

To insure the discharge of the matter from the chamber y of the trap', the bottom of' the latter is inclined toward the shoulder i, against A which lthe valve bears when closed.

I claim- 1. A backwater-trap provided with a valve, B, consisting of two or more sections hinged together, as set forth. 2. The case A, having endopenings for the reception of the ends of sewer-pipes, two chambers, one witha flat and the other with a inclined bottom, and with side bearings c c and bottom bearing i for a valve, B, as set forth.

A In testimony whereof l have signed my name to this specification in the presence of two subscribing witnesses.

LUDWIG BRANDEIS. Witnesses:

E. H. KEATING, GnAs. J. J oHNsoN. 

